Why Clark County once tagged an “e” on Clark and now doesn’t is curious, more so because the errant letter stubbornly clung like a cocklebur to a wool shirt for 70 years. Likewise, the county and city names were similarly unsettled after Congress in 1853 split the Oregon Country into two territories — Oregon and Washington.
Clark County’s namesake William Clark headed the Corps of Discovery mapping great swaths of the Louisiana Purchase. His signed documents tell the story. He never wrote his surname with a final “e.”
The Oregon Territory sent its first representative, Samuel Thurston, to U.S. Congress in 1848. The anti-British Thurston wrote the Donation Land Claim Act and worded it to assign the Hudson’s Bay Company land claim to the Oregon Territory. To the dismay of the British, the act passed in 1850. It awarded 640 acres to any married couple who’d occupy it for four years. Every family settling in Oregon land weakened the British claim.
Until 1849, much of the Washington Territory was one county, Vancouver County. It extended from the Columbia River to the Canadian border and from the Pacific into today’s Idaho and Montana. In 1849, the Oregon Territorial Legislature changed that, declaring “the name of the county of Vancouver be and hereby is changed to Clark.” From then, the Oregon Legislature seems to have consistently shunned that final “e.”